Postfix log

[stblack]

Hi,
I am trying to understand the functioning of postfix for what concern the rejection of email, but I can't find the way to enable a verbose log and see what decisions have been taken by postfix in order to evaluate the email valid and sent.
I tried to increase the debug_peer_level, but it seems not logging that things.

Thanks
Steven

[lightman47]

I found a number of problems with mine by using sudo systemctl status -l postfix after my isp started requiring smtp relay authentication recently.

[stblack]

Thanks,
that's the output, but unfortunately it's not helpful

Code: Select all

# sudo systemctl status -l postfix

● postfix.service - Postfix Mail Transport Agent
   Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2020-03-12 10:58:06 CET; 2h 40min ago
  Process: 2150 ExecStop=/usr/sbin/postfix stop (code=exited, status=0/SUCCESS)
  Process: 2167 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS)
  Process: 2164 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)
  Process: 2161 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
 Main PID: 2239 (master)
   CGroup: /system.slice/postfix.service
           ├─2239 /usr/libexec/postfix/master -w
           ├─2241 qmgr -l -t unix -u
           └─2379 pickup -l -t unix -u

Mar 12 10:58:06 srvml02 systemd[1]: Starting Postfix Mail Transport Agent...
Mar 12 10:58:06 srvml02 postfix/postfix-script[2237]: starting the Postfix mail system
Mar 12 10:58:06 srvml02 postfix/master[2239]: daemon started -- version 2.10.1, configuration /etc/postfix
Mar 12 10:58:06 srvml02 systemd[1]: Started Postfix Mail Transport Agent.

When I send an email it's delivering it, but I don't know why, and so I can't understand how to reject it.

Steven

[KernelOops]

You may increase the verbosity level per daemon (smtp, smtpd, etc) by adding the "-v" option in the equivalent line in master.cf. More details here.

I'll PM you my own configuration, maybe you can get some ideas.

[stblack]

Thanks @KernelOops ,
I tried adding -v, but no log is produced in maillog when the email is delivered.
I should study your file (thanks !) and find the right configuration for me.

Steven